一纸空文

a worthless piece of paper (idiom)

one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit

variant of 紙|纸[zhi3]

paper / CL:張|张[zhang1],沓[da2] / classifier for documents, letter etc

empty / air / sky / in vain

to empty / vacant / unoccupied / space / leisure / free time

language / culture / writing / formal / literary / gentle / (old) classifier for coins / Kangxi radical 67